Homework Help: chemistry

Posted by dave on Saturday, February 5, 2011 at 7:00pm.

Consider a red flame color produced by excited lithium with a wavelength of 671 nm. What is the mass equivalent of 1 mol of photons of this wavelength?

I can get as far as Js of E

Can't seem to find equation to turn Js into mols, or photons into mols, for Js into photons.

I'm lost

chemistry - bobpursley, Saturday, February 5, 2011 at 8:08pm
E=h*c/lambda Solve for E, the energy in one photon, then multily it by avagradros number.
chemistry - dave, Saturday, February 5, 2011 at 8:55pm
ahh, of course, thank you.

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